diff --git a/Makefile b/Makefile
index ee5d2419829937fe4005633d5713768108f7ae00..c9287d067f23719c7f8f7334d09daa2b6d87b3c9 100644
--- a/Makefile
+++ b/Makefile
@@ -62,7 +62,6 @@ build/asdf.lisp: $(all_lisp)
 	mkdir -p build
 	rm -f $@
 	cat $(all_lisp) > $@
-	chmod -w $@ # try to prevent accidental editing.
 
 # This quickly locates such mistakes as unbalanced parentheses:
 load: build/asdf.lisp